High Silica Glass Marbles belong to Na2O-B2O3-SiO2 glass. it’s used to make High Silica Glass fiber.

High Silica Glass Marbles belong to Na2O-B2O3-SiO2 glass. it’s used to make High Silica Glass fiber.

Product Properties:

1. Glass marble Chemical Composition

SiO2

B2O3

Fe2O3

Al2O3

Na2O

Others

67.5±1.0

23.0±1.0

≤0.2

1.0±0.3

8.0±0.5

residue

2. Softening point：≥700℃；

3. Density：2.3±0.1 g/cm3

4. Rate of Qualification：≥98%

Appearance Quality:

1. Glass Marbles Diameter is 16.00±0.7mm.Glass marbles shouldn’t be any out of round and deformed which is visible to nake-eye.

2. There shouldn’t have any big pits and over 5mm chapped surface, or other impurity such as oil alkali powder ,rust etc.It’s free of stones, coloured impurities, excessive air bubbles inside the marbles.